CN110240431B - Slag desulfurization method and application thereof in production of slag powder - Google Patents
Slag desulfurization method and application thereof in production of slag powder Download PDFInfo
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- CN110240431B CN110240431B CN201910673684.4A CN201910673684A CN110240431B CN 110240431 B CN110240431 B CN 110240431B CN 201910673684 A CN201910673684 A CN 201910673684A CN 110240431 B CN110240431 B CN 110240431B
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- slag
- flue gas
- solid
- desulfurization
- grinding
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- 239000002893 slag Substances 0.000 title claims abstract description 69
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 51
- 230000023556 desulfurization Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000843 powder Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000003546 flue gas Substances 0.000 claims abstract description 65
- 239000007787 solid Substances 0.000 claims abstract description 46
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 23
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011593 sulfur Substances 0.000 claims abstract description 22
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 22
- 238000000227 grinding Methods 0.000 claims abstract description 17
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims description 22
- 239000000428 dust Substances 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011575 calcium Substances 0.000 abstract description 5
- 229910052791 calcium Inorganic materials 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a slag desulphurization method and application thereof in producing slag powder. The slag desulfurization method comprises the following steps: drying, namely separating the slag into solid matters and flue gas; introducing the solid into a vertical mill for grinding, simultaneously introducing the flue gas into the ground solid, and performing primary desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas; after grinding, the specific surface area of the solid is not less than 415m2Per kg; the grinding temperature is 200-230 ℃; the temperature of the flue gas is 250-350 ℃. The method utilizes the calcium contained in the slag and the sulfur contained in the slag to carry out solidification, avoids additional use of a desulfurization process and generation of waste, is simple and efficient, and sulfur dioxide contained in the desulfurized flue gas is far lower than the national emission standard and can be directly discharged.
Description
Technical Field
The invention relates to the field of slag, in particular to a slag desulfurization method and application thereof in producing slag powder.
Background
Slag is generally waste slag generated in the steel industry, and the amount of the solid waste slag is large, so that the solid waste slag is inevitably recycled, for example, the slag is produced into slag powder, and then the slag powder is further recycled for building materials, such as cement, bricks, roadbed materials and the like. However, the solid waste residue contains sulfur with a non-negligible content, and the sulfur can be separated from the solid slag in a gas form in the process of producing the solid waste residue into slag powder, and if the sulfur directly enters the atmosphere, serious environmental problems are caused. Therefore, slag desulfurization is essential.
In the prior art, the desulfurization mode is mainly a limestone/lime-gypsum flue gas desulfurization process, and calcium sulfite and calcium sulfate generated after sulfur dioxide is absorbed by a calcium-based desulfurizer generate waste.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a slag desulphurization method, the method does not need to additionally arrange a desulphurization process and add calcium element, realizes high-efficiency desulphurization by utilizing the calcium contained in the slag and the sulfur contained in the slag for solidification, is simple and efficient, and can directly discharge sulfur dioxide contained in the flue gas after desulphurization, which is far lower than the national emission standard.
The second purpose of the invention is to provide the application of the slag desulphurization method in the production of slag powder.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a method of slag desulfurization comprising the steps of:
drying, namely separating the slag into solid matters and flue gas;
introducing the solid into a vertical mill for grinding, simultaneously introducing the flue gas into the ground solid, and performing primary desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas;
after grinding, the specific surface area of the solid is not less than 415m2/kg；
The grinding temperature is 200-230 ℃;
the temperature of the flue gas is 250-300 ℃.
Alternatively, the temperature of the milling may be independently selected from 200 ℃, 205 ℃, 210 ℃, 215 ℃, 220 ℃, 225 ℃, 230 ℃.
Optionally, the temperature of the milling is 210 ℃.
Alternatively, the temperature of the flue gas may be independently selected from 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 320 ℃, 330 ℃, 340 ℃, 350 ℃.
Optionally, the temperature of the flue gas is 300 ℃.
Optionally, the fineness of the solids is no more than 1.0% on a 45 μm sieve.
In the present invention, the fineness is expressed in the form of "rejects", and the unit "1.0% of μm sieve" represents: after sieving on a specific μm standard sieve, the mass ratio of the fraction remaining on the sieve was 1.0%. For example, "fineness is 1.0% on a 45 μm sieve" means fineness corresponding to "mass ratio of a portion remaining on the sieve after sieving on a 45 μm standard sieve is 1.0%".
In the invention, the slag can be separated into solid and smoke after being dried. The solids contain a relatively large amount of calcium elements, which are present in the slag in the form of calcium compounds, such as calcium oxide. Meanwhile, the sulfur element in the slag can be separated from the solid slag in a gas form and enter the flue gas.
In the invention, after the slag solid enters the vertical mill, the slag solid is ground, so that the slag solid has smaller fineness/particle size and larger specific surface area, and favorable conditions are provided for the full contact of the solid and the flue gas; the high-temperature flue gas provides favorable temperature conditions for the curing reaction between the calcium element in the solid and the sulfur element in the flue gas, so that the calcium element in the solid can efficiently absorb and cure the sulfur element in the flue gas to generate desulfurized ash such as calcium sulfate and the like, and the sulfur element in the flue gas in a gas form can be successfully cured and removed.
Optionally, the pressure difference in the vertical mill is 2800-2900 Pa.
Optionally, the pressure differential in the vertical mill is 2830 Pa.
Optionally, the method further comprises the step of performing secondary desulfurization on the flue gas subjected to primary desulfurization through a dust collector.
Optionally, after at least one primary desulfurization, part of the flue gas is recycled to the vertical mill, and the recycling is performed at least once; and/or: after at least one secondary desulfurization, part of the flue gas is circulated back to the vertical mill, and the circulation is carried out at least once.
In the invention, the desulfurized flue gas is circulated back to the vertical mill, so that on one hand, the desulfurized flue gas can be desulfurized with the solid in the vertical mill again, and on the other hand, the heat carried by the high-temperature flue gas can be fully utilized to provide temperature guarantee for desulfurization in the vertical mill, thereby realizing the cyclic utilization of the heat.
Optionally, the number of the cloth bags of the dust collector is 2800-2900.
Optionally, the total length of the cloth bag is 8800-8900 m; the diameter of the cloth bag is 125-135 mm.
Optionally, the number of the cloth bags of the dust collector is 2860.
Optionally, the overall length of the cloth bag is 8866 m; the diameter of the cloth bag is 130 mm.
In one embodiment, the cloth bag comprises acrylic.
In one embodiment, the size of the cloth bag is phi 130 x 3100 mm.
Optionally, the sulfur content in the finally discharged flue gas is not higher than 5.0mg/m in terms of sulfur dioxide content3。
According to another object of the present application, there is provided the use of any of the above slag desulfurization methods for producing slag powder.
After the slag is desulfurized by adopting the method, the desulfurized flue gas is subjected to heat exchange to obtain low-temperature flue gas, and sulfur dioxide contained in the low-temperature flue gas is far lower than the national emission standard and can be cleanly discharged; the solid matter of the slag forms slag powder, so that the slag powder is recycled and reused and is used as other materials, such as building materials and the like.
Optionally, the sulfur content in the finally discharged flue gas is not higher than 5.0mg/m in terms of sulfur dioxide content3The content of the particles is not higher than 18.0mg/m3。
Alternatively, the final emitted flue gas may achieve zero elemental sulfur content.
Compared with the prior art, the invention has the beneficial effects that:
(1) the slag desulfurization method provided by the invention does not need to additionally arrange a desulfurization process and add calcium element, realizes high-efficiency desulfurization by utilizing the calcium contained in the slag and the sulfur contained in the slag for solidification, is simple and efficient, and can directly discharge sulfur dioxide contained in the desulfurized flue gas which is far lower than the national emission standard.
(2) When the slag desulfurization method provided by the invention is used for producing slag powder, the flue gas can be discharged cleanly, and the slag powder production and desulfurization process can be completed in a line.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
As an embodiment, the slag desulfurization method includes the steps of:
drying, namely separating the slag into solid matters and flue gas;
introducing the solid into a vertical mill for grinding, simultaneously introducing the flue gas into the ground solid, and performing primary desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas;
after grinding, the specific surface area of the solid is not less than 415m2/kg；
The grinding temperature is 210 ℃;
the temperature of the flue gas is 300 ℃.
As an embodiment, the fineness of the slag separated solids after drying does not exceed 1.0% on a 45 μm sieve.
As an embodiment, the pressure difference in the vertical mill is 2830 Pa.
As an embodiment, the slag desulfurization method includes the steps of:
drying, namely separating the slag into solid matters and flue gas;
introducing the solid into a vertical mill for grinding, simultaneously introducing the flue gas into the ground solid, and performing primary desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas;
a step of performing secondary desulfurization on the flue gas subjected to primary desulfurization through a dust collector;
after at least one secondary desulfurization, part of the flue gas is circulated back to the vertical mill, and the circulation is carried out at least once.
In one embodiment, the number of the cloth bags of the dust collector is 2860; the total length of the cloth bag is 8866 m; the diameter of the cloth bag is 130 mm.
As an embodiment, the sulfur content in the finally discharged flue gas is not higher than 5.0mg/m in terms of the sulfur dioxide content3。
EXAMPLE 1 desulfurization of slag
The components of the slag are as follows:
LOSS on ignition (LOSS on ignition): 1.03%;
Fe2O3：0.54％；
Al2O3：15.15；
CaO：40.68％；
MgO：7.00％；
SiO2：31.79％；
SO3：1.30％。
drying the slag to form solid matters and flue gas; introducing the solid into a vertical mill for grinding, simultaneously introducing high-temperature flue gas into the ground solid, and performing desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas; the desulfurized flue gas can be partially recycled to the vertical mill, and can also be fully recycled to the vertical mill.
Wherein the pressure difference in the vertical mill is 2830Pa, and the grinding temperature is 210 ℃; after grinding, the fineness of the solid is 1.0 percent of a 45-micron sieve, and the specific surface area is 415m2And/kg, the temperature of the high-temperature flue gas is 300 ℃.
The high-temperature flue gas after desulfurization is converted into low-temperature flue gas through heat recovery, and the sulfur content in the low-temperature flue gas is not higher than 5.0mg/m in terms of sulfur dioxide content3The content of particulate matters is not higher than 18mg/m3And the emission is far lower than the national emission standard, and the waste can be directly emitted.
And after desulfurization treatment, recovering the solid to obtain slag powder.
EXAMPLE 2 desulfurization of slag
The desulfurization method in this example is substantially the same as that in example 1, except that after the primary desulfurization is performed in the vertical mill, a secondary desulfurization step of passing the flue gas subjected to the primary desulfurization through a dust collector is further included. The high-temperature flue gas after the secondary desulfurization can be partially recycled to the vertical mill, and can also be fully recycled to the vertical mill.
Wherein:
the cloth bags of the dust collector are acrylic cloth bags, the size of each cloth bag is phi 130 multiplied by 3100mm, the number of the cloth bags is 2860, and the total length of the cloth bags is 8866 m.
The high-temperature flue gas after desulfurization treatment is converted into low-temperature flue gas through heat recovery, and the sulfur content in the low-temperature flue gas can be zero by the content of sulfur dioxide, is far lower than the national emission standard, and can be directly discharged.
And after desulfurization treatment, recovering the solid to obtain slag powder.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for slag desulfurization, characterized in that the method comprises the steps of:
drying, namely separating the slag into solid matters and flue gas;
introducing the solid into a vertical mill for grinding, simultaneously introducing the flue gas into the ground solid, and performing primary desulfurization by utilizing the reaction of calcium element in the solid and sulfur element in the flue gas;
after grinding, the specific surface area of the solid is not less than 415m2/kg；
The grinding temperature is 200-230 ℃;
the temperature of the flue gas is 250-350 ℃;
the pressure difference in the vertical mill is 2800-2900 Pa;
the fineness of the solid is not more than 1.0 percent of a 45-micron sieve;
the method also comprises the step of carrying out secondary desulfurization on the flue gas subjected to the primary desulfurization through a dust collector;
the number of the cloth bags of the dust collector is 2800-2900; the total length of the cloth bag is 8800-8900 m; the diameter of the cloth bag is 125-135 mm;
the sulfur content in the finally discharged flue gas is not higher than 5.0mg/m in terms of the sulfur dioxide content3。
2. The slag desulfurization method according to claim 1, wherein the grinding temperature is 210 ℃.
3. The slag desulphurization method according to claim 1, wherein the temperature of the flue gas is 300 ℃.
4. The slag desulfurization method according to claim 1, wherein the pressure difference in the vertical mill is 2830 Pa.
5. The slag desulfurization method according to claim 1, wherein after at least one primary desulfurization, a part of the flue gas is recycled to the vertical mill, the recycling being performed at least once; and/or
After at least one secondary desulfurization, part of the flue gas is circulated back to the vertical mill, and the circulation is carried out at least once.
6. The slag desulfurization method according to claim 1, wherein the number of the cloth bags of the dust collector is 2860; the total length of the cloth bag is 8866 m; the diameter of the cloth bag is 130 mm.
7. Use of the slag desulphurization process of any one of claims 1 to 6 for the production of slag powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910673684.4A CN110240431B (en) | 2019-07-24 | 2019-07-24 | Slag desulfurization method and application thereof in production of slag powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002336646A (en) * | 2001-05-16 | 2002-11-26 | Taiheiyo Cement Corp | Flue gas treating agent and method of treating used flue gas treating agent |
| CN102228774B (en) * | 2011-05-27 | 2013-07-24 | 中钢集团鞍山热能研究院有限公司 | Method and device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas |
| CN105498517A (en) * | 2015-11-30 | 2016-04-20 | 攀钢集团攀枝花钢钒有限公司 | Application of furnace slag as desulfurization absorber and desulfurization method |
| CN106914125A (en) * | 2017-05-17 | 2017-07-04 | 莱芜市泰钢工程设计研究有限公司 | Flue gas passes through grinding slag dust-removal and desulfurizing method of denitration and system equipment |
| CN109084593A (en) * | 2018-08-08 | 2018-12-25 | 钢研晟华科技股份有限公司 | A kind of device and method using the dry slag micropowder of sintering flue gas waste heat |
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